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Fertilizer application method for reducing methane emission in rice field

An application method and technology for paddy fields, applied in the direction of fertilization method, application, fertilization device, etc., can solve the problems of decreased organic matter content, high cost, unsuitable fertilizer application, etc., to reduce methane emissions, achieve high yield and emission reduction, suitable for The effect of promoting the application

Pending Publication Date: 2022-04-12
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Application of chemical fertilizers instead of organic fertilizers can reduce the activity of methanogens in paddy soil and effectively reduce CH in paddy fields 4 However, the long-term application of chemical fertilizers has a great impact on paddy soil and ecological environment, such as soil compaction, acidification, organic matter content decline and other environmental problems
In recent years, the rise of slow and controlled-release fertilizers can alleviate the contradiction between high yield and emission reduction to a certain extent, but due to its high cost, as a rice field CH 4 Emission-reducing fertilizer applications are not suitable for
In addition, although straw returning is an effective way to increase soil organic matter, improve soil structure, and rationally utilize straw resources, it will also stimulate CH 4 emissions

Method used

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  • Fertilizer application method for reducing methane emission in rice field
  • Fertilizer application method for reducing methane emission in rice field
  • Fertilizer application method for reducing methane emission in rice field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1. Rice seed treatment

[0045] Choose a sunny day to dry the seeds for 2 days to increase the germination rate and germination uniformity; pay attention to preventing high temperature damage to the seeds when drying the seeds.

[0046] After drying the seeds, soak them in the soaking spirit solution for 48 hours. The soaking spirit solution is prepared according to the soaking spirit: water volume ratio of 1:15. When using, mix 16mL soaking spirit solution for every 10kg of seeds. Rinse with clean water after soaking, germinate until the root grows one grain, and the bud grows half a grain, which is used for sowing.

[0047] 2. Seedling field treatment

[0048] The germinated paddy seeds are sown in the seedling field, the amount of hybrid rice per mu of seedling field is about 7.5kg, and the amount of conventional rice per mu of seedling field is about 16kg.

[0049] 3. Rice field treatment

[0050] 6 days before rice transplanting, the winter wheat straw was plowe...

Embodiment 2

[0063] Plant conventional paddy rice according to embodiment 1 method, as experimental group (microbial fertilizer), and control group (conventional fertilization) is set:

[0064] 6 days before rice transplanting, winter crop wheat straw and plow it back to the field, and transplant the seedlings when the rice seedlings are about 22 days old; the NPK nutrient input per mu is 14.3kg / mu (pure), N:P 2 o 5 :K 2 O is configured according to 1:0.5:1; 60% nitrogen fertilizer, 100% phosphorus fertilizer and 50% potassium fertilizer are applied as base fertilizer at one time before transplanting, 20% nitrogen fertilizer is applied at the tillering stage, and 20% nitrogen fertilizer and 50% potassium fertilizer are applied at the booting stage .

[0065] The effects of different groups of fertilizer treatments on rice yield and its composition were compared, and the results are shown in Table 1.

[0066] Table 1

[0067]

[0068] The above results showed that the difference in r...

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Abstract

The invention discloses a fertilizer application method for reducing methane emission in a rice field, which comprises the following steps: (1) rice field treatment: ploughing winter wheat straws and returning to the field, and applying ammonium bicarbonate and a microbial agent at the same time; applying a bio-organic fertilizer before rice transplanting; (2) transplanting rice seedlings: transplanting the rice seedlings to the rice field treated in the step (1) when the rice seedling age is 20-25 days; (3) fertilizer application after transplanting: urea is applied in the tillering stage; applying a microbial liquid fertilizer in a booting stage. Through cooperation of the organic fertilizer, the chemical fertilizer and the microbial fertilizer, the yield of the rice is guaranteed, and meanwhile methane emission of the rice field is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of rice cultivation, and in particular relates to a fertilizer application method for reducing methane emission from rice fields. Background technique [0002] Greenhouse gases are the main cause of climate warming, methane (CH 4 ) as one of the most important greenhouse gases, the warming potential is CO 2 28 times. It is estimated that about 60% of CH in greenhouse gas emissions 4 comes from agricultural production, and rice fields are CH in agricultural production activities 4 One of the main sources of emissions of greenhouse gases, accounting for about 19% of global greenhouse gas emissions. Therefore, can paddy CH be achieved while ensuring high rice yield? 4 Emission reduction is a new challenge for modern rice production. [0003] Paddy CH 4 The formation of methane must go through a series of complex biochemical reactions, which is the result of the interaction between methanogenic archaea an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01C21/00A01G22/22A01C1/00
Inventor 徐春梅王丹英
Owner CHINA NAT RICE RES INST